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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01dea969177ed1fccc54f17937095b3ae5fb418a5f99bd663bc3a5d4e3b828e3' 
  AND token = 'PDEs17MIc6n1JRGT+sXT8WOnXi355uz50XJ2txufN+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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