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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed9cb2fe22faeb1a9fbe11d3cb28eaf5e4f2e59019f2a273551daa19566f055' 
  AND token = 'FROv/F68IxUOxPB2VMD2rezKWT9vYR82uA9upx+SJxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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