SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a10db295d49ab26ae6f49785e1fcc0c5896d5b31d8c98675b9e31315dbab720d' 
  AND token = 'U/4BM1jzmObvLwlHzvmyjXWbTfbhyPEvapDOV7oJmFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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