Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aec2ba9ed5ede1b84805c6daadee9ecc4c0c1c787413b1e1103e0f51ea7a2caa' 
  AND token = '2YCO/ngeud4IaQnrwrymdIxLiqEXV7I7znWlSZsVkQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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