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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79f4e3cc46f80d7b6564ac38a201cd09e39b3201a9836dca919b038c80d08ecb' 
  AND token = '/bRyEHD4YNNXoHM/w3hKCzqX01AX9XrmhzqvOeecxjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}