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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbacd8a6efa3ca2a0fa81f17893a3c7e2c119fffd69582b0fa952bf7b155c538' 
  AND token = 'AbxU5W5cZgkxy85KmgewUlfNOilPWIceHYKHdsSY9aA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00121

JSON explain

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