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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4025bfb508d1675f8234a5c0aa5793fb21846abe89b101d32a3c8564e066eed7' 
  AND token = 'JzZCfI67kdSd2H/DFNLipOy2+X6Ywb7XXzkOjblwzwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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