Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0efe30c48752320fa6c5460ad5d84191df119be588b844c2ac612e42197fada5' 
  AND token = 'fHi4H/arWOabRSqPZPLnT2JIBqpob1r9ZD9Z1RWaTHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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