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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e116c064b924f645842f96b1baef28ddd662acba198435281f46baae7020d1d' 
  AND token = 'Q8PN43/OTKjHuBOKqdcD/F0ZBPII1kjH8K0QRIDcMPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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