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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ba24b832c2ae98438629ac0d0db02525849782dc01b36f4c590e124234d9076' 
  AND token = 'gyJIpXuWd4SEFyG8WdcJ6Xxgx0EY7waA2FOo/vstMaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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