Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78419c5834a68cf0e2855eb65f5606fb758b3ce640c60e4125a80d409ce0df7d' 
  AND token = 'UjRz1qHSOU55dVcNyl/OxqD+ENTfVTwZanfA6s+wtyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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