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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '709fd9bc986b57498933ee1f8ec9064c3d7177c2a129f7f7f917de3ebdcb3b7d' 
  AND token = 'ZcZ5nc5G5sN4+ddpik/POeg8HCjwv0gWGU86vIbcS1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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