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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efb4f442f8e13088afed5afaa75ae01dca954e8bb0041aa9bd570f50abd897b7' 
  AND token = 'ZbU58kLTSmKhjulmVNhLQqqW3LP0/+tz70lLjww5Q3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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