Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38b74d215b2fab5ac263143052b06a0f82083ca48e5c976b271f0ad8a84134aa' 
  AND token = 'WZ3FH2Y9XWZsYb9B6hXLa6ViZ2gik/BAj7pHlhO0UpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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