Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b77297db13d4485378c834f34e339631ce0672dec152fe940f45e4d72cf2b7d' 
  AND token = 'FuyMRftUeUFXWDqXcHkSl9fFTVymUu+2Uc4ygBhwbt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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