SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eca1e6b435c3f9d691fe7611a4a1871ab46c88df53a173253b2e265a34847320' 
  AND token = 'H5zXPNo9gmUavRuFYiaoZUY5NmKxX3bHNLUzgqdK0P4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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