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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aeed8524f3b15c7f0ec1e18a3de0a5e58fa83a5b28202a3185c69c077a5b3dc' 
  AND token = '/RZNQiep3e09nG/gfRDXorXQfv0WvP2ra1Vdt0TAeQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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