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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e73368890c80f5413f44855db5ab1d9cc008db062c7ba416896ae04610cd072' 
  AND token = 'RudciFSaTBocuQ+jEJ96Fwamw0/wD6pbPlxq9Ds2e3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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