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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f04d93a05a36706bc022d5ca08f92f00514e09d1b0701fbb00741a460f68a40a' 
  AND token = 'ZHyjPZLEIseUCsky/RIAsx7wkAvLGHLG4b6exIoibpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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