Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4f67e145a503e594c8dfa70e8ef29ab4ffd705bc11a7a27b505b7876917a7fc' 
  AND token = '9ngqjpSsTZfYy5IXMApxHLLREvRnRg6RqEweXEFu0Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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