Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '280c93deec4aa1c38f0fad7854df98bdf86ab5331742ba1b8ee1ef43c210c855' 
  AND token = 'SkrLTLqADOmUGSSYiyE7vm7LnYpkKTEiC9BxJPPIcPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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