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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '411ed511f584440a488b50674116263470831d64a0f4adf5b3eecd1d69d3c707' 
  AND token = 'zwmk+74725e+s6KgO1jVdqAaMNoZCukgeDCUl+Efd1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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