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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d27bc171ef61d0b3264f3a07a80101090bab6a879bc13f9b551c1140a921fcf' 
  AND token = 'Htu6/YFkN6kjfPn5XaioK/TMSFmYfxJ3zJSJBXQI2LA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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