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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '562bdfce2428dd7eac230f7e66b19d52ee01a6cd90b567af3bd58e5347c2b374' 
  AND token = 'mbxre2MRXjb1h1yA/ROVGQ0EVlX7XJzfh6MJtRakUpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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