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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1a61cb3db2b8b0bc0567c976207baf02b17d449b919c982d2ce45b12824bc38' 
  AND token = 'OIFvwc6317Z1h5whJoS1OaSmZIlik/hbcZJR5oj1QTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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