Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b084b46fd711cbec41edb757b11063863ffdc1f0f7238a51a27bf2db46e2d5e2' 
  AND token = '5LtBA66RW9Ycwmm8SmBvzA9mYQr4TteMfSGqZnshsqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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