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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b95a7b7c4b39e74e459173c878ad80d20c19c30ec058ccce5422c52047fa9b6' 
  AND token = 'H4Q2zn70ZorOayXkaXmRTKMR1GFuic3eUO2e3jlEVOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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