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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97794a4e08d4f89873088947d69a4c0e08430160f5630d2d0b9c06f14cec5118' 
  AND token = 'DEI44JwfY5ZdSSobN+uOvZSBM0gUchXoVRlBBOlFPNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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