Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '143d71993a998bc4b229459314bc5c699c6f6cd597316ef06ed91e752ed5f210' 
  AND token = 'Z37ufHkd3Rvykcb0oGJrBW3qssICjcDdT7ZT4JLwY2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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