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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd094da7c326885561d1d9d62ee9ff9cceafd3fdb5d5177b0f27ef32a6192d759' 
  AND token = 'bhNv900ypEpoIDP4KjZK61OVSQ9Rr9N8o/8YIYK58+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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