SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c87924812f13123b7f937c438a90b650ffc8f352462f08093aa399f858877c0' 
  AND token = 'ISsVDhZPKDaHptw7likkLXd9HlYvLc0oNoKjWRZvUBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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