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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd076821a87d9d519bcc10d32d7827fe55cc73c42b1107ab7f2f5e129cbe572d' 
  AND token = 'Ed12/GNnKggAHvSSroeUmgq9egrzy9Odx3rfQ7eaXok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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