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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '822443c70364ef04e1e33f8d55cbe51d02570c83a87c1f73604999a19d889cf3' 
  AND token = 'dbEw6ohw9W2BgrZ0Lu2vvzREIyQorcgLombbca/6Z6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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