Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '932388b43217a4035678ca63397146bcb7035bddd0dee621e1e6dab3eef77b81' 
  AND token = '0ONKxQrtHgXLZtk4/vVC1aj7HvOm2qsRvI1+TiUGkaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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