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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef8c5c164b2bbed4f6a6019136e8d2141cc7a31abd2e81bbed9317e772965d0d' 
  AND token = 'VE/z5Z/Al1ZkE44+ShwAk3y+MjkZBp+Acs00hzRud/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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