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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca976f75bd219f3452d4b4843041f7865a70f0c040eda909a11dfffafa152e4e' 
  AND token = 'HkveOJ0cyy00NB2evbIyZ+HJC/PKQbQWjrYJbGDc/XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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