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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7acd184adbf447b924ff04630a9fba98593fd3319d4542dbe2012e3ffc24a181' 
  AND token = 'y619GG6V18io+F5nUMw8iHxoJPtD547YD2ia7+ziiOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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