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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '946f85b53fd2976cfb791e10ede77686e98cdbce20bd37f4e950a420f0c99503' 
  AND token = '2t4HZQpGGNp24Dx4ljWjdy3JsTlqVpJZDdT9TSsvsWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}