Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18616d8ffa26c98f1a64c9c6f158a363762caba54ecff57c9fbaaaa305247fe8' 
  AND token = '0N+Ix2NqjkHxV/cGL9IF+tW618BAfI/tDZsNHImuTjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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