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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6e889b7eab060026e9a1c788f8e00cf8114184d7ca043acc68829328441216e' 
  AND token = 'yohichT7s4NpIK/w5TEPrV5cKqkyiIVMuAHiD4cTNRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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