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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5911eae9130bdd8c6c0bc45cf3144cf6043814df3e884d499e1986b467dc057' 
  AND token = 'OHasrszzxYp9fwQcheYVFX3sosm8wbQH1H9Zo7Ps1mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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