SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2f46d3e7e362c0c76a38f21047daead5e30fb581b498da98107cb5965346d44' 
  AND token = 'LUNF1y8CXTLI98cQwyVEqFvKhbAn+1QkMB3fX3iFKbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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