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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bab06ed50af39d1ab6902b68959ba164d7448df0fdd7ad42e065af8defc70f5f' 
  AND token = 'hQbJYPYPDGXzefXuZUxIKNgOQXVVd86kM0uNRps3UmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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