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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e36386f1c1a9b8807fde28d92319bcf57ba2544dd07b81f045f2b7ce852e254c' 
  AND token = 'ka+mJ+2WVMcEWW2b4057P7rP8g01EEBGl2X/BhLWnFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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