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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2072029e2a8d3facabf1b991eeba0c0c6984b402bc754bfc02bbed75053ae5e' 
  AND token = 'y5FmbkhqmKgUQJKVk2sR2vvDKhZsQj8v8SrdbWsa6yM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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