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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01679eb3163a0e3ac59925715c568a1c8cd7a79a7f54c737c85e6e9436faf579' 
  AND token = 'GBbhTQfmUGcLLniepCFURmh36wz5VzH6q76RS8AFKEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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