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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '692991cdfb809b0a06493b2e9572acaf4ca33d361a52497d0e9ecbeec9ba11e3' 
  AND token = '7Q7kd8vPX5Ew3yxhVgs4+Ey2O+yUCskzLn8r3ERmUuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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