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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e99df9158259285befb6530ed49a06d337a676e337077b02a66a3dc8ca57731' 
  AND token = 'LtYY16THAyHBwi+mxcs/XbxzF3Fqo8etZ5J1tJ4RRtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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