Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e81cdc299109ba201d1ed4bf37cd4a52a07001011c48e4652c2d71594f8db94b' 
  AND token = 'fOM8dnZ07YipbOR19sd6zLjF7OCdjJFOEnZ28UQeETk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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