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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25a478c1d13ccc855cb449a8c2c44c50c5cb422340e6478c299bf12873313b20' 
  AND token = 'n0En8+KXJZnIuDmxy9q4ZMccwU8vAlroAvNug5ZDwtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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