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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d701a9afc120a1e81df07ec37f8351bd7feeb036ff52e9e3fc145cf6256b620' 
  AND token = 'qsCWBw3O1Tx6Qnt+ftoPItoXyVe05uBr1n6V/oCw7Oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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