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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7132382357a6bba31a2e86a9830d6545c16e6556a093fd31cc309ac3b449f93f' 
  AND token = 'y2V56e+4xb3HnYFxS2lWWuWcayh5pdV0h0lrslWeIk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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