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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf54888fff636296bf3621d4af3578f23ae724f48d096a66a7c25f8672875e29' 
  AND token = 'EGXXUu9xZ7YaWOIN9ZYS8Cjtm8nJTxqatCSNIGLXgyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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