Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea0deaaafee6d857020067e7b641930ff2be98edb0f1cacd9fbb0b49e6c25081' 
  AND token = 'XOGwmhM2uqvuwSPjsWB8F81CfjwAF0fzTRIojjKDE70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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