Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '846c0643fc34e4f2d3c4a7a03d33b7b1526d1339b7c5475e913425580cbc9ec1' 
  AND token = 's++ShqVUvLK568rCGP1pvUiMpIphLBQXTq2Lex2ed7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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