SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c5de19509212c85b2ec5e5af2763bfc398cbe43a08901639013df6bec3b1648' 
  AND token = 'a4Bf9LFYV51ZYCuwHDZBRM6+4Qtz4V25Rz6yFRgfTig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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