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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd80df04ae85098ff805a6eb3f476a3e161a6025f0f4b8987e28de2494179e79' 
  AND token = 'sPZM/dZhHf9F3UvaBS2RlEvcfJw01GMl1o3QHyCfhTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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