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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7244a8cd3a8a0f68875b693ff66ffa82b1f7e41c808dcabd12eee117f37f0825' 
  AND token = 'R+Dkev6a9gmEuLewj9TJz4IRV5UnsDjJg+PRsK1kTzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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