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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '053a100962ac5e98f850812ec8b61f8907072a9b910ee58a8086cf87c0b3b2d9' 
  AND token = 'pp1c9ZwIz2SJ7BV45RQJGK190zkNuYt5zD92LjpOBtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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