Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15eb37c52e53eeb95fa926abaec679f66c397e917a25bd853a53afb90f983a69' 
  AND token = 'nOty3p1Kh/2/eBP2imgSTX4/sTTn1rdItjo3AsRwTJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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