Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b49fda3ad42b85c2ba88eddc9e6793a4a67fc491d29276260456ccb55095d84f' 
  AND token = 'rjAaFEoPk0Pc1uri9OuSLozB4N22wa6pOQedeHoK8DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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