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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eceb09e5d894ed446d9113b6c8ee3bb6ab66a1de0aeb3d34321888b99e94809d' 
  AND token = '1Gnxp4JQ++QeBKwAnGx7been88a6m3r0xVTjp54AhwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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