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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ffd42f3e26d3bbcf6487b112e2dc190c6d83734a23bd39ffd40e9c9f43ffd8c0' 
  AND token = 'medHh/iUIdwjzuqt9EIRxheXMU0xUE54I7icVSPUGX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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