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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd302daf989ef0a04f7b2964490cce5e752a56801999129bab73bdfc4fb762a27' 
  AND token = 'RtiHLPgs7dSX9q2VS/L8C5yEuhOh6p4qY6RV9+TTx+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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