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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e65d09a396d40be607c8ce6c00ec906c16af33e76a6fbb88f13d14aa340b95a' 
  AND token = 'bg2pWsNBwkRS3yenoBmOily1RV3GpkDxTrdui5+Vmb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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