Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9184ca68838bce0369d0ab187a24a0b6f9dadc50e2c1afd6dc8d7a91330e64f6' 
  AND token = '1bpwCGCO8AsQnAtHflOwPJIDEK03kXZ8KxsP9+rMibo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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