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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f9df647c0d7222f2df11fad4cd34a4b369a5c78c458de709fb831aeffd2fea8f' 
  AND token = 'hT3LNMxYupyfEuq8GEL9CD/BtTdIcIA70AS3t8g5cQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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