Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9d06657d3daa5051c67f519e8b2d0abcb00bacd6cb68a071e5f0e99c904d226' 
  AND token = 'OWMpH1Qj5D0Jw9oKARIfLrsnaS0lDCM2nu494kA2WRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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