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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27d4fe5f56edc0cd8e4cfd0060f12beda02bb01182102f9bc6000b35fe94dae7' 
  AND token = 'N0A9+srwUhOOf5OjY+AAU3DH4LeITHmqExw76L8Lb9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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