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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7613d780a675d6a8b6c5cc28d9e378a17b3e7ece69ef254af87e12f419cdc2d8' 
  AND token = 'mL/iCHwoMR+IuTBVe6Tanp/IgrZ2E2oIBS3zA+M/kcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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