Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd42f55303072e8007d3e640b7d7f3d09e2b1d6a54a80129bf32eb992ccffe45d' 
  AND token = 'odQYSF5xSjQ/IW5GjmTFZgA263FGtQugGFt1fBfkFTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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