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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0ed64f18baa75b75702cc72d9c2d288e358e3d6d4a7515ece28b59061acdee9' 
  AND token = 'joDzNxDJSxEMw9fte0EL0l2iWV2zaqfBd8OqSUcsuFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}