Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4512e0e4750ea5d18894e4e24136753c8f138e0332b4c2ea43f8ccc7b29e9353' 
  AND token = 'LZKNcjmQI60Qro274wb+CGmLBOli8aBw2IaEy713rm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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