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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7014c4aba8e354ecdee61f5d1c036dbbeb466a824d9f67ed37459ca8ba39b69e' 
  AND token = 'gdAcj/enfVYsr3nKcQu2v7LpvBypcOEii0MxquCx6Pw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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