Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '484e0552781f5a3edd47062d3d6102f509e3d52c09a4cd2b83d937103bc42089' 
  AND token = 'qTPFsDmWeTATA8IQL43REYuX//9CgAhIdrowJ/auL2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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